import java.util.PriorityQueue;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User:
 * Date: 2025-04-20
 * Time: 21:33
 */
class MyTimerTask implements Comparable<MyTimerTask>{
    private Runnable task;
    private long time;

    public MyTimerTask(Runnable task, long time){
        this.time = time;
        this.task = task;
    }

    @Override
    public int compareTo(MyTimerTask o) {
        return (int) (this.time - o.time);
    }

    public long getTime(){
        return time;
    }

    public void run(){
        task.run();
    }
}

class MyTimer{
    private PriorityQueue<MyTimerTask> queue = new PriorityQueue<>();

    private Object locker = new Object();

    public void schecule(Runnable task, long delay){
        synchronized (locker){
            MyTimerTask timerTask = new MyTimerTask(task, System.currentTimeMillis() + delay);
            queue.offer(timerTask);
            locker.notify();
        }
    }

    public MyTimer(){
        Thread t = new Thread(() -> {
            try{
                while(true){
                    synchronized (locker){
                        while(queue.isEmpty()){
                            locker.wait();
                        }
                        MyTimerTask task = queue.peek();
                        if(System.currentTimeMillis() < task.getTime()){
                            locker.wait(task.getTime() - System.currentTimeMillis());
                        }else{
                            task.run();
                            queue.poll();
                        }
                    }
                }
            }catch (InterruptedException e){
                e.printStackTrace();
            }
        });
        t.start();

    }
}

public class demo10 {
    public static void main(String[] args) {
        MyTimer timer = new MyTimer();
        timer.schecule(new Runnable() {
            @Override
            public void run() {
                System.out.println("hello 3000");
            }
        },3000);
        timer.schecule(new Runnable() {
            @Override
            public void run() {
                System.out.println("hello 2000");
            }
        },2000);
        timer.schecule(new Runnable() {
            @Override
            public void run() {
                System.out.println("hello 1000");
            }
        },1000);
    }
}
